WO2015017942A1

WO2015017942A1 - Method for connecting multiple panel-shaped material portions using a hollow rivet

Info

Publication number: WO2015017942A1
Application number: PCT/CH2013/000138
Authority: WO
Inventors: Andreas J. BLÄTTLER
Original assignee: Bossard Ag
Priority date: 2013-08-08
Filing date: 2013-08-08
Publication date: 2015-02-12

Abstract

The invention relates to a method for connecting multiple panel-shaped material portions (1a, 1b) to one another using a hollow rivet (2). In said method, the material portions (1a, 1b) to be connected are arranged so as to adjoin one another face to face. A through-hole is then introduced into the material portions (1a, 1b). For this purpose, a stamping or boring mandrel (3) is used. A hollow rivet (2) is then introduced into the through-hole such that the hollow rivet (2) passes through the through-hole. Subsequently, the hollow rivet (2) is arranged in the through-hole in such a manner that it widens by introducing a stamping or boring mandrel (3) contour (18, 20), which expands the central through-opening of the hollow rivet (2), into the through-opening, whereby the rivet connection between the panel-shaped material portions (1a, 1b) is produced. Using the method according to the invention, a hollow rivet connection can be produced with a single tool.

Description

Method for connecting a plurality of plate-shaped material sections by means of a hollow rivet

TECHNICAL AREA

The invention relates to a method for connecting a plurality of plate-shaped material sections, preferably a plurality of sheets, by means of a hollow rivet, arrangements for use in the method, punching or drilling mandrels for such arrangements, a hollow rivet for sol ^¬ che arrangements and an apparatus for performing the method using Such arrangements according to ^¬ the preambles of the independent claims.

STATE OF THE ART

To connect components with hollow rivets must be certified according to ^¬ only a hole be drilled in the components to be connected or punched to the prior art with drilling or punching tools. So ^¬ then the rivet is used and with a Nietvorrich ^¬ device, such as a rivet pliers, pressed. For the ^{erection of} such a riveted connection, at least two tools and a plurality of separate process steps are necessary, which makes the riveting process relatively cumbersome and difficult to access in places.

PRESENTATION OF THE INVENTION

It is therefore the object to provide methods and devices that do not have the aforementioned disadvantages of the prior art or at least partially avoided.

This object is solved by the subject matters of the independent claims.

Accordingly, a first aspect of the invention relates to a method for connecting a plurality of plate-shaped material sections, preferably a plurality of sheets, to each other by means of a hollow rivet. Here advertising the area of the material to be joined in the position, which they should take after joining together relative to each other, arranged flat adjacent to each other. Then, a through-hole is made in the plate-shaped material sections arranged in such a way that runs essentially perpendicular to their planar extension. For this purpose, a punching or drilling mandrel is used. Then, in the punched or drilled through hole, a hollow rivet, that is, a rivet is introduced with a longitudinally extending therein central passage opening, such that the hollow rivet passes through the through hole. The hollow rivet thus arranged in the through hole is then widened into this passage opening by introducing a contour of the punching or drilling mandrel which widens its central passage opening, whereby the riveted connection between the plate-shaped material sections is produced. The introduction of the passage opening widening contour of the punching or drilling mandrel in the passage opening can be purely translational in the longitudinal direction of the central opening, or even in the context of a complex movement, for example, with simultaneous rotation of the same around the longitudinal axis of the punching or drilling mandrel. It can be done by inserting the punching or drilling mandrel in the through ^¬ opening or pulling the punch or drill mandrel through the through hole and / or by screwing the punch or reaming mandrel with a through opening widening former thread into the through hole.

With the method according to the invention, a hollow rivet connection can be produced with a single tool.

In a first preferred Verfahrensvarian ^¬ te a punching or drilling mandrel is provided with a opposite its through-hole-forming working end tapered shank used to produce the through-hole. The hollow rivet is so in the punched or drilled Inserted through hole that it passes through the through hole and is penetrated even in its central through hole from the shaft of the punch or reaming pin. Preferably, this is done in such a way that a hollow rivet arranged on the shank of the punching or drilling mandrel is introduced after the through hole has been produced. The thus in the through hole angeord ^¬ designated hollow rivet is then entge- by passing the working end of the punch or Bohrdorns through the central passage of the hollow rivet in a direction gene of the punching or drilling direction is widened, so that the rivet connection between the plate-shaped material portions is prepared.

In a first preferred embodiment of this first variant of the method, the working beitsende of punching or Bohrdorns thread-forming contours, preferably a shaper external thread, and is used for expansion of the hollow rivet under formation of a Ge ^¬ wind in the direction opposite to the punching or drilling direction screwed into the passage opening. This embodiment has the advantage that the punching or drilling mandrel can automatically pull into the through-hole by rotation and can move through it, with a widening of the hollow rivets.

It is preferred in embodiments in which the punching or drilling mandrel is formed as a reaming mandrel, that the direction of rotation for drilling the through hole is opposite to the direction of rotation for screwing the thread forming contours of the working end of the punching or drilling mandrel in the through hole for expanding the tubular rivets.

In a second preferred embodiment of this first variant of the method, the hollow rivet is widened out of its central bore by pulling the punching or drilling mandrel counter to the punching or drilling direction, whereby the riveted connection between the plate-shaped material sections is produced. The Extraction of the punching or drilling mandrel can be purely translational, or even in the context of a more complex movement, for example, while rotating it about its longitudinal axis around.

In a second preferred variant of the method, a punching or drilling mandrel with a shank section which is widened in relation to its through-hole producing working end is used to produce the through-hole. The hollow rivet is introduced into the punched or drilled through hole in such a way that it passes through the through hole and is penetrated by the punching or drilling mandrel itself in its central passage opening. The hollow rivet thus arranged in the through-hole is then widened into its central passage opening by inserting the extended shank portion of the punching or drilling mandrel in the punching or drilling direction, whereby the rivet connection between the plate-shaped material portions is produced. The introduction of the extended shaft portion of the punch or drill mandrel into the central passage opening can be purely translatory, or even in the context of a more complex movement, e.g. while rotating it about the longitudinal axis of the punching or drilling mandrel. The punching or drilling mandrel is then removed from the central passage opening of the expanded hollow rivets, preferably in a direction opposite to the punching or drilling direction.

With the two variants of the method mentioned above, the method according to the invention can be carried out particularly efficiently, since it makes it possible to arrange the hollow rivets in the through hole directly together with the punching or drilling mandrel during the production of the through-hole and immediately afterwards with the punching punch. or broadening mandrel.

In a preferred embodiment of the second variant of the method, the extended shank section of the punching or drilling mandrel has thread-forming contours. Ren, in particular a multi-course former thread, and is screwed to widen the hollow rivet forming a thread in the through hole of the hollow rivet. In this way, the thread-forming contour of the punching or drilling mandrel automatically pulls itself into the central passage opening of the hollow rivets and widens them progressively.

It is preferred that the punching or drilling mandrel is designed as a reaming mandrel and the direction of rotation for drilling the through hole is identical to the direction of rotation for screwing the extended Schaftab ^{¬ section of} the punching or drilling mandrel in the Duchgangsöff- tion of the hollow rivets for expanding the tubular rivets , As a result, directly after the drilling of the passage ^¬ hole without interruption or without reversing the direction of rotation, possibly with a reduced speed, the expansion of the hollow rivets by screwing the extended shaft portion of the drill mandrel into the through hole of the rivet.

Preferably, after the expansion, the removal of the punching or drilling mandrel from the central passage opening of the hollow rivets is carried out by unscrewing in a direction opposite to the screwing direction of the extended shaft portion from the thread formed in the central passage opening. This results in the advantage that the riveting point only has to be accessible from one side.

In a further preferred embodiment of the second variant of the method, a punching or drilling mandrel is used which, following the enlarged shank portion, which is inserted for expanding the hollow rivets in the central Durchgangsgsöffnung the hollow rivets, compared to the extended shank portion extended drilling and / or Reibschneidenanordnung having. According to this embodiment, the extended shaft section for expanding the hollow rivet in punching or

Drilling direction through the central Durchgangsgsöffnung the Hollow rivets passed and then the so-expanded through hole of the expanded hollow rivets by introducing the drilling and / or Reibschneidenanordnung in the punching or drilling direction under rotation of the punching or drilling mandrel in the intended direction of rotation of the drilling and / or Reibschneidenanordnung drilled and / or rubbed. As a result, the already enlarged when expanding the hollow rivet through hole is further increased, so that removal of the punch or reaming mandrel from the through hole of the tubular rivets is facilitated and preferably even in embodiments of the inventive method in which an expansion of the hollow rivet is performed by means of a forming thread, can be purely translational. This makes it possible to carry out the method according to the invention without providing axial forces acting in the direction opposite to the punching or drilling direction. Entsprech ^¬ end it is for example possible with a reaming rod designed as demanding according punching or drilling mandrel, the method by driving it with a commercially available drill perform.

It is preferred in embodiments in which the punching or drilling mandrel is formed as a reaming mandrel, that the direction of rotation during drilling is identical to the working direction of rotation of the drilling and / or Reib- cutting assembly. This also makes it possible to carry out the method with a single direction of rotation of the drill mandrel without an interruption in order to reverse the direction of rotation.

In a preferred first sub-variant of both the first and the second variant of the method, the through-hole is brought by the punching or drilling mandrel to its final dimension before expanding the hollow rivets, so that the hollow rivet can be easily introduced into the generated through hole prior to expansion. This variant has the advantage that simple, inexpensive hollow rivets can be used. In an alternative, second preferred

Subvariante both the first and second method variant, the through hole produced by the punching or drilling mandrel is brought by the introduction of the hollow rivet to its final dimension before expansion of the hollow rivets, that is initially punched or drilled through the punching or drilling ^¬ mandrel or through hole extended by the introduction of hollow rivets.

It is preferred that a hollow rivet with drilling and / or reaming blades which have a Wirkdurch- diameter greater than that with the punching or drilling mandrel generated through hole, while rotating the hollow ^¬ rivets in the intended cutting direction of the drilling and / or Reibschneiden is introduced into the through hole, whereby the through hole is drilled to its final mass before expansion of the hollow rivet and / or wiped.

This second preferred sub-variant has the advantage that it can be worked with a significantly lower degree of expansion of the rivet than in the first sub-variant, so that a great design freedom with respect to the choice of material and dimensioning of Nietver ^¬ bond results.

The hollow rivet is driven rotationally in a preferred embodiment on the punching or drilling mandrel, in another preferred embodiment it is driven over the outside of the hollow rivet engaging drive means at a standstill or at ro ^¬ tierendem punching or drilling mandrel. Depending on the application of the method, one or the other embodiment may be more preferable.

A second aspect of the invention relates to a first arrangement for use in the method according to the first aspect of the invention in the first method variant. The arrangement comprises a punching or reaming mandrel for producing a preferably circular through-hole by a plurality of surfaces adjacent to one another. zende plate-shaped material sections, preferably sheets, by punching or drilling. The punching or drilling mandrel has a shaft tapered with respect to its working end producing the through hole. Furthermore, the arrangement comprises a hollow rivet with a central passage opening and with a preferably cylindrical outer contour, which can be inserted into a through hole produced by the punching or drilling mandrel and is penetrated by the shank of the punching or drilling mandrel or can be penetrated, ie the shaft of the punching or drilling mandrel is arranged or can be pushed onto this. The working end of the punch or Bohrdorns has thread-forming contours, bevorzugterwei ^¬ se a multiple Formergewinde, and the punching or drilling mandrel and the hollow rivets are dimensioning in choice of materials and di- matched such to each other that the shank of the punch or Bohrdorns in their passage ^¬ opening interspersed rivets through a screwing the Ar ^¬ beitsendes of punching or Bohrdorns in the direction ent ^¬ against the punching or drilling direction in the passage opening of the hollow rivet under formation of a thread can be widened in the passage opening, in such a way that they after expansion is no longer usable in a through hole produced with the punch or reaming mandrel. This embodiment has the advantage that the punching or drilling mandrel can automatically pull into the through hole of the hollow rivet by rotation and can move through it, with a widening of the hollow rivets.

In this case, in embodiments of the arrangement in which the punching or drilling mandrel is designed as a drill mandrel, it is preferred that the direction of rotation for drilling is opposite to the direction of rotation for screwing in the thread-forming contours of the working end of the punching or drilling mandrel into the through-opening Hollow rivets for expanding the hollow rivets. A third aspect of the invention relates to a second arrangement for use in the method according to the first aspect of the invention in the first method variant. The arrangement comprises a punching or drilling mandrel for producing a preferably circular through-hole through a plurality of flat plate-like material sections, preferably sheets, by punching or drilling. The punch or reaming mandrel has a shank tapered from its working-hole-producing end. Furthermore, the arrangement comprises a hollow rivet with a central passage opening and with a preferably cylindrical outer contour which can be inserted into a through hole produced by the punching or drilling mandrel and is penetrated or penetrated by the shank of the punching or drilling mandrel, ie on the

Shank of the punching or drilling mandrel is arranged or can be pushed onto this. The punching or reaming mandrel and the hollow rivets are matched in material selection and dimensioning in such a way that the punching or drilling mandrel can be pulled through the through-opening of the tubular rivet on its shaft contrary to the best punching or drilling direction so that after flaring it can no longer be inserted into a through hole produced by the punching or drilling mandrel.

A fourth aspect of the invention relates to a third arrangement for use in the method according to the first aspect of the invention in the first variant of the method. This arrangement also comprises a punching or drilling mandrel for producing a preferably circular through-hole through a plurality of flat plate-like material sections adjoining one another, preferably sheets, by punching or drilling. The punching or drilling mandrel has a shaft tapered with respect to its working end producing the through hole. Furthermore, the arrangement comprises a hollow rivet with a central passage opening and with a preferably cylindrical outer contour, which of the

Stem of the punching or drilling mandrel is interspersed or can be penetrated, that is arranged on the shaft of the punching or Bohrdorns or can be pushed onto this. The hollow rivet has drilling and / or reaming cutters which have an effective diameter larger than the through hole producible with the punching or drilling mandrel, so that the through-hole produced by the punching or drilling mandrel is produced by inserting the hollow rivets while rotating them in the intended condition Cutting direction of the drilling and / or reaming in the through hole can be increased. The working end of the punch or Bohrdorns has thread-forming contours on before ^¬ zugterweise a shaper external thread, and the punching or drilling mandrel and the hollow rivet are matched in choice of materials and dimensioning of such another such that the hollow rivet by a screwing in of the working end of the punch or Bohrdorns in the direction opposite the punching or drilling direction can be widened into the passage opening of the hollow rivet while forming a thread in the passage opening.

It is in embodiments of the Anord ^¬ voltage at which the punching or drilling mandrel is designed as a reaming rod, preferably in that the rotational direction is opposite to drill to the direction of rotation for a ^¬ rotate the thread-forming contours of the working end of the punch or Bohrdorns in the Through opening of the hollow rivets for expanding the hollow rivets.

A fifth aspect of the invention relates to a fourth arrangement for use in the method according to the first aspect of the invention in the first variant Ver ^¬ drive. This arrangement likewise comprises a punching or drilling mandrel for producing a preferably circular through-hole through a plurality of plate-shaped material sections adjoining one another in a flat manner, preferably metal sheets, by punching or drilling. Of the Punching or drilling mandrel has a with respect to its through hole producing working end tapered shank. Furthermore, the arrangement comprises a hollow rivet with a central passage opening and with a preferably cylindrical outer contour, which is penetrated by the shaft of the punching or drilling mandrel or can be penetrated, that is arranged on the shaft of the punch or Bohrdorns or can be pushed onto this. The hollow rivet has drilling and / or reaming cutters which have an effective diameter greater than the through hole producible with the punching or drilling mandrel, so that the through-hole produced by the punching or drilling mandrel by inserting the hollow rivets while rotating the same in the intended

Cutting direction of the drilling and / or reaming in the through hole can be increased. The punching or drilling mandrel and the hollow rivets are matched in material selection and dimensioning in such a way that the punching or drilling mandrel can be pulled against the intended punching or drilling direction by the hollow rivet on its shaft and this, without flaring them, so widening, that it can no longer be inserted into a hole produced by the punching or drilling mandrel and widened by its introduction under rotation after the expansion.

In a preferred embodiment of the arrangement, the shank of the punching or drilling mandrel, preferably in a region near the working end of the punching or drilling mandrel, has driver contours into which a corresponding mating contour of the hollow rivet positively engages in the intended direction of rotation of the drilling and / or friction cutting edges or can engage or on which the hollow rivets, while generating a force and / or positive connection between the shaft and the hollow rivets in the intended direction of rotation of their drilling and / or Reibschneiden can be pressed to transmit the torque for the rotation of Hollow rivets from the shank of the punching or drilling mandrel on the hollow rivets. In this way, the rotary drive of the hollow rivets can be realized in a simple manner by a rotation of the punching or drilling mandrel.

Advantageously, the driver contours are formed as ribs extending in the longitudinal direction of the shank, preferably ribs extending spirally in the longitudinal direction of the shank, whose spiral rotation direction is such that the hollow rivets, when sliding along the helical ribs due to the transmission of torque from the helical ribs Ridges on the tubular rivets in the intended direction of rotation of their drilling and / or Reibschneiden moves axially in the direction of the working end of the punch or Bohrdorns. This prevents the hollow rivet from being pushed off the ribs during drilling of the passage hole by means of its drilling and / or reaming cutters.

Using these arrangements, the method according to the first aspect of the invention in the first method variant can be carried out particularly easily.

A sixth aspect of the invention relates to a first arrangement for use in the method according to the first aspect of the invention in the second variant of the method. This arrangement also comprises a punching or drilling mandrel for producing a preferably circular through-hole through a plurality of flat plate-like material sections adjoining one another, preferably sheets, by punching or drilling. The punch or reaming mandrel has a working end that extends beyond its through-hole

Shank section on. Furthermore, the arrangement comprises a hollow rivet with a central passage opening and with a preferably cylindrical outer contour, which is penetrated by the punching or drilling mandrel or can be enforced, ie, is arranged on the punching or drilling mandrel or can be pushed onto this. The hollow rivet has drilling and / or reaming cutters which have an effective diameter greater than the through hole producible with the punching or drilling mandrel, so that the through hole produced by the punching or drilling mandrel can be rotated by inserting the hollow rivets in the intended cutting direction Drilling and / or reaming in the through hole can be increased. The punching or drilling mandrel and the hollow rivets are matched in material selection and dimensioning in such a way that the hollow rivets are so widened by introducing the extended shaft portion of the punching or drilling mandrel into the through hole of the hollow rivets without aufzuspren ^¬ gen conditions can be that after the expansion no longer in a produced with the punching or drilling mandrel and can be used by their introduction under rotation extended through hole can be used.

Using this arrangement, the method according to the first aspect of the invention in the second variant of the method can be carried out particularly easily.

In a preferred embodiment of the arrangement according to the sixth aspect of the invention, the extended shank portion of the punch or Bohrdorns thread-forming contours, in particular a mehrgängi ^¬ ges forming thread, and can be screwed to widen the hollow rivets to form an internal thread in the through hole. In this way, the ge ^¬ windeformende contour of the punching or drilling mandrel during rotation of the same can automatically pull into the central Durchgangsöff ^¬ tion of the hollow rivets and this widening it progressively.

It is preferred that the punching or drilling mandrel is formed as a drill mandrel and the direction of rotation of the drill mandrel for drilling is identical to the direction of rotation of the hollow rivets for expanding the through hole and with the direction of rotation of the drill mandrel for screwing its extended shaft portion in the through hole the hollow rivets for expanding the hollow rivets. With such a reaming mandrel, it is possible directly after the drilling and widening of the through hole, without interruption or without reversing the direction of rotation, turn the extended shank portion of the drill mandrel into the through hole of the rivet, for widening the hollow rivets.

A seventh aspect of the invention relates to a punch or reaming mandrel for an assembly according to the second or the fourth aspect of the invention. The punch or reaming mandrel has a shank tapered from its working-hole-producing end. The working end of the punching or drilling mandrel has thread-forming contours, which preferably comprise a multi-course shaping external thread.

It is preferred in embodiments in which the punching or drilling mandrel is formed as a reaming mandrel, that the direction of rotation is opposite to the direction of rotation for screwing the thread-forming contours of the working end of the punching or drilling mandrel in the through hole of the hollow rivets for expanding the drilling tubular rivets.

An eighth aspect of the invention relates to a punch or reaming mandrel for an assembly according to the sixth aspect of the invention. The punching or drilling mandrel preferably has, in a region close to its working end, a relative to the working end of the punch ^¬ or Bohrdorns extended shaft portion having thread-forming contours, preferably with a multiple thread forming.

In a preferred embodiment, this punching or drilling mandrel is designed as a drill mandrel, wherein the direction of rotation of the drill mandrel for drilling the through hole in the plate-shaped material portions is identical to the direction of rotation for screwing the thread-forming contours of the enlarged shaft portion into the through hole in the hollow rivet. A ninth aspect of the invention relates to a punch or reaming mandrel for an arrangement according to the fifth aspect of the invention in the last two embodiments with Mitnehmerkonturen. The punching or drilling mandrel, in addition to the described in the fifth aspect of the invention characteristics of the punch or reaming pin, preferably in an area near its working end, Mitnehmerkonturen, which are preferably designed as extending in the longitudinal direction of the shaft ribs.

In a preferred embodiment, this punch or reaming mandrel is formed as a reaming mandrel, which preferably in a region near its working end spirally extending in the longitudinal direction of the shaft ribs, wherein the spiral rotation direction is such that a standing on the shaft and in engagement with the ribs standing Hollow rivets in a sliding along the spiral ribs due to the transmission of torque from the ribs on the tubular rivets in the intended direction of rotation of the drill mandrel moves axially in the direction of the working end of the Bohr ^¬ spine.

A tenth aspect of the invention relates to a hollow rivet for an arrangement according to the fourth, the fifth or the sixth aspect of the invention. The hollow rivet comprises a rivet body with a central body

Through opening, which has a substantially cylindrical rivet shank, arranged at a first end of the rivet shank and radially beyond the rivets ^¬ projecting rivet head and a plurality of arranged at the second end of the rivet shank Bohr- and / or Reibschneiden.

In a preferred embodiment of the hollow rivet, its rivet shank has, in the region of its end adjacent to the drilling and / or reaming edges, preferably uniformly distributed over its circumference, a plurality of radial bores extending from the outside to the outside extend into the central passage opening. These holes serve as relief bores for any cracks arising after the introduction and expansion of the hollow rivets from the drilling and / or reaming edges.

In a further preferred embodiment of the hollow rivet, its rivet shank, preferably evenly distributed on its circumference, has segmental cuts which preferably penetrate radially radially into the rivet shank towards the rivet head. These segment cuts serve to minimize the change in length of the hollow rivets during expansion.

In yet another preferred embodiment of the hollow rivet, its rivet shank has on its circumference a multi-helical groove and / or rib structure, the individual helical grooves and / or ribs of which round the rivet shank in each case several times. By this configuration, there is the advantage that the hollow rivet during insertion into the through hole under rotation thereof, similar to a screw, draws into the through hole.

In this case, it is further preferred for the multiple helical groove and / or rib structure to be penetrated by a plurality of grooves, preferably evenly distributed on the circumference of the rivet shank, which extend essentially in the axial direction or over the entire axial length of the grooves - And / or rib structure extend only over a portion of the circumference of the rivet and penetrate in the radial direction in the rivet, in particular deeper penetrate into the rivet shank than the groove and / or rib structure. Through these grooves cutting edges are formed on the groove and / or rib structure, which allow a screwing ^¬ the hollow rivets under a cutting incision of the groove and / or rib structure in the boundaries of the through hole. The grooves serve as chip grooves. In yet another preferred embodiment of the hollow rivets, the drilling and / or reaming cutters are formed by a frontally spiral-toothed cutting arrangement or comprise such a cutting arrangement. Such drilling and reaming cutters have the advantage that they only require a relatively low cutting pressure.

In yet another preferred embodiment of the tubular rivets, the drilling and / or reaming cutters are formed by a two-stage cutting arrangement or comprise such a two-stage cutting arrangement. Such a cutting arrangement enables an optimization with regard to the penetration behavior of the rivet.

An eleventh aspect of the invention relates to an apparatus for carrying out the method according to the first aspect of the invention using an arrangement according to the third or the fifth aspect of the invention, wherein the punch or reaming mandrel of the arrangement is designed as a reaming mandrel.

The device comprises a receptacle for the

Shaft of the Bohrdorns and drive means with which the drilling mandrel positioned ^¬ nommenem shaft in the intended rotation Rich ^¬ processing of Bohrdorns can be rotated relative to stationary parts of the device for its intended purpose in the housing, under a pressure on the drilling mandrel by means of the device as intended drilling feed of the drill mandrel. Thereby, it is using the apparatus possible to incorporate with the reaming rod, the through hole in the surface anein- other adjacent plate-shaped material portions, optionally with a rotating A ^¬ bring the hollow rivet for the purpose of extension of the generated with the drilling mandrel through hole by means of drilling and / or reaming the hollow rivet.

Furthermore, the device comprises stop means with a stop surface on which, in a first lativposition of the stop means relative to the reaming mandrel, arranged on the shank of the reaming mandrel hollow rivet when recorded as intended in the recording

Shaft of the drill mandrel can strike in the direction opposite to the predetermined Bohrvorschubrichtung, and drive means by which when properly recorded in the recording shank of the drill mandrel, starting from the first relative position of the stop means relative to the drill mandrel, a relative movement between the stop means and the drill mandrel are generated can, in which the drill mandrel moves in the direction opposite to its predetermined Bohrvorschubrichtung against the stop surface of the stop means. In this way, it is also possible with the device to hold in the through hole the hollow rivet inserted into the through hole and penetrated by the shank of the drill mandrel in the through hole

Drill mandrel opposite to the drilling direction is pulled out under a widening of the hollow rivet from the hollow rivet.

With such a device, the method according to the first aspect of the invention in the first method variant can be carried out particularly easily and quickly.

BRIEF DESCRIPTION OF THE DRAWINGS

Further embodiments, advantages and applications of the invention will become apparent from the dependent claims and from the following description with reference to FIGS. Show:

Figures la to lc different views of a first inventive arrangement comprising a drill mandrel according to the invention and a plurality of inventive rivets in a first embodiment;

Figures 2a to 2c different views of the reaming mandrel of the arrangement of the figures la to lc;

FIGS. 3a to 3d show different views of a hollow rivet according to the invention in a second embodiment; FIGS. 4a to 4c show different views of a hollow rivet according to the invention in a third embodiment;

Figures 5a to 5d different views of a hollow rivet according to the invention in a fourth embodiment;

FIGS. 6a to 6c show different views of a hollow rivet according to the invention in a fifth embodiment;

FIGS. 7a to 7c show different views of a hollow rivet according to the invention in a sixth embodiment;

FIGS. 8a to 8d show different views of a hollow rivet according to the invention in a seventh embodiment;

9 shows the hollow rivets from FIGS. 3a-3d and the reaming mandrel from FIGS. 2a to 2c during riveting of two sheets;

10 shows a section through a second arrangement according to the invention when riveting two sheets;

FIGS. 11a to 11c show different views of the reaming mandrel of the arrangement of FIG. 10;

12 shows a section through a third arrangement according to the invention when riveting two sheets; and

13 shows a section through a fourth arrangement according to the invention when riveting two sheets.

WAYS FOR CARRYING OUT THE INVENTION

1a to 1c show various views of an arrangement 8 according to the invention, namely a plan view of the arrangement 8 (FIG. 1a), detail A of FIG. 1a (FIG. 1b) and a perspective top view of the arrangement 8 (FIG lc). As can be seen, the arrangement 8 comprises a drill mandrel 3 according to the invention and a plurality of drill mandrels 3 arranged on the shank 5 of the drill mandrel 3. te inventive hollow rivets 2 with three-stage drilling and reaming edges 6, 7th

As can be seen in conjunction with FIGS. 2 a to 2 c, which shows a plan view of the drill mandrel 3 (FIG. 2 a) of the arrangement 8, the detail B of FIG. 2 a (FIG. 2 b) and a perspective top view of the drill mandrel 3 (FIG. 1c), the drill mandrel 3 has a working end 4 designed as a twist drill and a shank 5 tapered with respect to this working end 4, which steplessly merge into one another via a frustoconical surface 17. In the region near the working end 4 5, the shaft of the Bohrdorns 3 spirally extending in the longitudinal ^¬ direction of the shaft ribs 9 to which the foremost respectively arranged hollow rivet 2 generation prior to performing the inventive method, under ER of a frictional and positive connection between the

Shaft 5 and the hollow rivet 2 in the rotational direction about the shaft 5 of the drill mandrel around, is pressed to allow transmission of the torque required for the rotation of the hollow rivet 2 from the shaft 5 of the drill mandrel 3 on these rivets. 2

As can be further seen, the spiral rotation direction is such that the pressed-on hollow rivet 2, in a possible sliding along the spiral ribs 9 due to the transfer of the same for the introduction of the hollow rivet 2 in the through-hole produced by the mandrel 3 enlarging the same by means of Bohr and friction cutting required torque from the ribs 9 on the hollow rivets 2, axially in the direction of the working end 5 of the drill mandrel 3 wanders.

FIGS. 3a to 3d show a second embodiment of the hollow rivet 2 according to the invention, namely a longitudinal section through the hollow rivets 2 along the line AA in FIG. 3b (FIG. 3a), a front view of the hollow rivets 2 from the cutting side (FIG. 3b), a cross section through the hollow rivet 2 along the line BB in Fig. 3a (Fig. 3c) and a perspective top view looks at the hollow rivets 2 (Fig. 3d). As can be seen, the hollow rivet 2 is formed by a rivet body having a central through-hole 10 which has a substantially cylindrical rivet shank 11, a rivet head 12 located at a first end of the rivet shank 11 and radially overhanging the rivet shank 11 and a plurality of the second End of the rivet 11 arranged drill bits 6 and 7 Reibschneiden. In the region of its end adjoining the drilling and friction cutting edges 6, 7, the rivet shank 11 has uniformly distributed over its circumference a plurality of radial bores 13, which extend from the outside into the central passage opening 10. Next, the rivet shank 11 evenly distributed on its circumference four segment cuttings 14 which penetrate radially towards the rivet head 12 into the rivet shank 11.

The hollow rivets 2 illustrated in FIGS. 1 a to 1 c differ only in the geometry of the drilling and reaming cutters from the hollow rivet 2 illustrated in FIGS. 3 a to 3 d.

FIGS. 4a to 4c show a third embodiment of the hollow rivet 2 according to the invention, namely a longitudinal section through the hollow rivets 2 along the line AA in FIG. 4b (FIG. 4a), a front view of the hollow rivets 2 from the cutting edge side (FIG. 4b) and a perspective top view of the hollow rivets 2 (FIG. 4c). This hollow rivet differs from that illustrated in FIGS. 3 a to 3 d only in that it has no radial bores on the rivet shank 11.

FIGS. 5a to 5d show a fourth embodiment of the hollow rivet 2 according to the invention, namely a longitudinal section through the hollow rivets 2 along the line AA in FIG. 5b (FIG. 5a), a front view of the hollow rivets 2 from the cutting edge side (FIG. 5b), a cross section through the hollow rivet 2 along the line BB in Fig. 5a (Fig. 5c) and a perspective top view looks at the hollow rivets 2 (Fig. 5d). This hollow rivet 2 differs from that shown in Figures 3a to 3d only in that it has no Segmentanschnitte on the rivet shank 11.

FIGS. 6a to 6c show a fifth embodiment of the hollow rivet 2 according to the invention, namely a longitudinal section through the hollow rivet 2 along the line BB in FIG. 6b (FIG. 6a), a front view of the hollow rivet 2 from the cutting edge side (FIG. 6b) and a perspective top view of the hollow rivets 2 (FIG. 6c). This hollow rivet 2 differs from that shown in Figures 3a to 3d only in that it has other drilling and reaming edges 6, 7, deeper segment cuttings 14 and the rivet head 12 towards the outside diameter decreasing rivet shank 11.

FIGS. 7a to 7c show a sixth embodiment of the hollow rivet 2 according to the invention, namely a longitudinal section through the hollow rivet 2 along the line AA in FIG. 7b (FIG. 7a), a front view of the hollow rivet 2 from the cutting edge side (FIG. 7b) and a perspective top view of the hollow rivets 2 (FIG. 7c). This hollow rivet 2 is also gebil ^¬ det of a Nie ^¬ tenkörper with a central through hole 10, which has a substantially cylindrical rivet shank 11 and arranged at a first end of the rivet shank 11 radially beyond the rivet shank 11 protruding rivet head 12. At the other, second end of the rivet shank 11 drilling and reaming cutting in the form of an end-face spiral-toothed Schnei ^¬ denanordnung 6, 7 are arranged. The rivet shank 11 has on its circumference a multi-helical rib structure 15 whose individual helical ribs each surround the rivet shank 11 several times.

FIGS. 8a to 8d show a seventh embodiment of the hollow rivet 2 according to the invention, namely a longitudinal section through the hollow rivet 2 along the line AA in FIG. 8b (FIG. 8a), a front view of FIG Hollow rivets 2 from the Bohrschneidenseite ago (Figure 8b), a cross section through the hollow rivet 2 along the line BB in Fig. 8a (Fig. 8c) and a perspective plan view of the hollow rivet 2 (Fig. 8d). This hollow rivet 2 is similar to that illustrated in FIGS. 7a to 7c, but has a two-stage spiral-toothed cutting arrangement 6, 7 instead of the simple spiral-toothed cutting arrangement. Also, in this hollow rivet 2, the rib structure 15 is penetrated by a plurality of evenly distributed on the circumference of the rivet shank 11 grooves 16 which extend over the entire axial length of the rib structure 15 each only over a portion of the circumference of the rivet shank 11 and in the radial direction in the rivet shank 11 penetrate. Another difference is that the rivet shank 11 of this hollow rivet 2 in the region of its adjoining the blade assemblies 6, 7 end evenly distributed over its circumference a plurality of radial bores 13 which extend from the outside to the central passage opening 10 inside.

Fig. 9 shows the hollow rivets 2 from the figures

3a to 3d during the riveting of two sheets la, lb with the aid of the reaming spindle from FIGS. 2a to 2c. Shown here is the state in the implementation of the method according to the invention, in which the through hole passing through hollow rivet 2 has already been expanded by passing the drill mandrel 3 through its passage opening in a direction opposite to the drilling direction S and only the working end of the Drill mandrel 3 is arranged in the widened passage opening.

10 shows a section through a second arrangement 8 according to the invention comprising a drill mandrel 3 according to the invention and a hollow rivet 2 according to the invention with drill bits 6 during the riveting of two metal sheets 1a, 1b. As in synopsis with the figures IIa to

11c, which shows a plan view of the drill mandrel 3 (FIG. 11a) of the arrangement 8, the detail A from FIG. 11a (FIG. 11b) and a perspective top view of the drill mandrel 3 (FIG Drill mandrel 3 designed as a twist drill working end 4 and a relative to this working end 4 tapered shaft 5, which pass over a frustoconical surface 17 steplessly into one another.

In the region adjacent to the frustoconical surface 17, the working end 4 of the drilling mandrel 3 is as

Cylinder body formed, which carries a forming thread 20 at its periphery.

In order to arrive at the situation shown in FIG. 10, starting from two separate sheets 1a, 1b, in which the hollow rivet 2 is widened and the sheets 1a, 1b are riveted by means of the hollow rivets 2, the following procedure is adopted:

In a first step, the sheets la, lb are stacked in the desired connection position. Then in this position with the working end

4 of the drill mandrel 3 a through hole in the sheets la, lb drilled. The hollow rivet 2 is already on the shaft

5 of the drill mandrel 3 is arranged. In a further step, the through hole produced with the working end 4 of the drill mandrel 3 is then drilled out to the outer dimension of the rivet 2 with the aid of the drill bits 6 of the hollow rivet 2. For this purpose, the hollow rivet 2 (not shown) is rotated in the working direction of their drill bits 6 via a force acting on its head 12 while simultaneously advanced in the drilling direction S until it rests with the underside of its rivet head 12 on the upper plate la. In this position, the hollow rivet 2 is held on the head 12, while the drill mandrel 3 is screwed with rotation in a direction opposite to the direction of rotation with his former thread 20 in the through hole of the hollow rivet 2, whereby the reaming mandrel 3 through the Former thread 20 is progressively pushed in the direction opposite to the drilling direction S through the through hole and thereby widening the through hole of the hollow rivet 2 and thus the entire hollow rivet 2 with the truncated cone-like surface 17 and the former thread 20.

In order to remove the reaming mandrel 3 from the hollow rivet 2 starting from the situation illustrated in FIG. 10, the reaming mandrel 3 is rotated further in the direction of rotation counter to the drilling direction until its former thread 20 has completely exited the rivet head 12. Then, the remaining part of the working end 4 of the drill mandrel 3 can be pulled out of the through hole of the hollow rivet 2 and the drill mandrel 3 are removed.

FIG. 12 shows a section through a third arrangement 8 according to the invention comprising a drill mandrel 3 according to the invention and a hollow rivet 2 according to the invention with drill bits 6 when riveting two metal sheets 1a, 1b.

As can be seen, the drill mandrel 3 has a working end 4 designed as a twist drill and a shank 18 which is widened in relation to this working end 4 and which, via a frustoconical surface 17, are steplessly merged with one another.

In the area adjacent to the truncated cone-like surface 17, the working end 4 of the drill mandrel 3 is formed as a cylinder body.

The extended shank 18 of the Bohrdorns 3 carries in the region adjacent to the frustoconical FLAE ^¬ surface 17 at its periphery a Formergewinde 20, whose direction of rotation for screwing the same identical in the drilling direction S as the rotational direction of the working end 4 formed as a twist drill for drilling. ^·

In order to arrive at the situation illustrated in FIG. 12, starting from two separate sheets 1a, 1b, in which the hollow rivet 2 passes through the two sheets 1a, 1b but has not yet expanded, the following procedure is adopted: In a first step, the sheets la, lb are stacked in the desired connection position. Then, in this position with the working end 4 of the drill mandrel 3, a through hole in the sheets la, lb drilled. In this case, the hollow rivet 2 is already arranged on the formed as a cylinder body part of the working end 4 of the drill mandrel 3. In a further step, the through hole produced with the working end 4 of the drill mandrel 3 is then drilled with the aid of the drill bits 6 of the hollow rivets 2 on the outer dimension of the drill bits 6 of the rivet 2. For this purpose, the hollow rivets 2 by means of

Drill mandrel 3 in the working direction of their drill bits 6 rotates while advanced in the direction of drilling S. The torque for driving the hollow rivets 2 is transmitted via an engagement of the starting region of the forming thread 20 in the passage opening of the hollow rivet 2. Once the hollow rivets 2 has penetrated the through hole and rests with the underside of its rivet head 12 on the upper plate la, the rivet 2 is prevented by the increased frictional forces on the further rotation. This situation is illustrated in FIG. 12. In order to increase this effect, 12 additional teeth may be arranged on the underside of the rivet head. It is also provided to provide the rivet shank in the area adjoining the rivet head 12 with a thread which digs into the walls of the through hole when the hollow rivet 2 is rotated in the direction of rotation of the rivet and then pulls the rivet head 12 against the upper sheet la ,

Due to the obstruction of the rotation of the hollow rivet 2 in the illustrated situation, the drill mandrel 3 is rotated in a further rotation of the same with its forming thread 20 in the through hole of the hollow rivet 2, whereby it progresses through the forming thread 20 in the drilling direction S in the Through hole is pushed and thereby with the frustoconical surface 17 and the enlarged shaft 18 with Former thread 20, the through hole of the hollow rivet 2 and thus the entire hollow rivet 2 expands.

As soon as the former thread 20 emerges from the hollow rivet 2 on the side of the drill bit, the hollow rivet 2 is completely widened and the drill mandrel 3 can be rotated out of the through opening again by rotation in a direction opposite to the screwing direction until its former thread 20 has completely exited the rivet head 12 is. Then, the remaining part of the working end 4 of the drill mandrel 3 can be pulled out of the through hole of the hollow rivet 2 and the drill mandrel 3 are removed.

FIG. 13 shows a section through a fourth arrangement 8 according to the invention comprising a reaming mandrel 3 according to the invention and a hollow rivet 2 according to the invention with drill bits 6 during the riveting of two sheets 1 a, 1 b.

This arrangement 8 differs from that shown in FIG. 12 only in that the drilling mandrel 3 has, on its enlarged shank 18, a reamer cutting arrangement 19 which is widened in relation to this shank 18, following the former thread 20 arranged thereon.

As soon as the former thread 20 emerges from the hollow rivet 2 on the side of the drill bit and the hollow rivet 2 is completely widened by means of this reaming arrangement 19, with continued rotation of the drill mandrel 3 in the direction of drilling or screwing in and advancing the latter into boring or boring. Screwing-in direction S, the expanded passage opening of the hollow rivets 2 are wiped to a diameter corresponding to the outer diameter of the forming thread 20, so that the reaming mandrel 3 is then simply pulled out of the passage opening of the hollow rivets 2 in the direction opposite to the drilling or screwing-in direction S and can be removed.

While in the present application preferred embodiments of the invention are described is It should be clearly understood that the invention is not limited to these and may be practiced otherwise within the scope of the following claims.

Claims

PATENT CLAIMS

1. Method for connecting several plate-shaped material sections, in particular several sheets (la, lb), to one another using a hollow rivet (2), ^comprising the steps:

a) arranging the material sections (la, lb) to be connected so that they are adjacent to one another in the desired connection position;

b) Introducing a through hole essentially perpendicular to the flat extension of the plate-shaped material sections (la, lb) in the flatly adjacent plate-shaped ones

Material sections (la, lb) using a punching or drilling mandrel (3);

c) introducing a hollow rivet (2) with a central through opening (10) into the through hole, such that the hollow rivet (2) passes through the through hole; and

d) expanding the hollow rivet (2) passing through the through hole by introducing a contour (3, 17; 18) of the punching or ^drilling mandrel (3) into the opening (10) which widens the central through opening (10) of the hollow rivet (2). the hollow rivet.

2. The method according to claim 1, comprising

Steps :

b) Introducing a through hole ^essentially perpendicular to the surface extent of the plate-shaped material sections (la, lb) in the flatly adjacent plate-shaped material sections (la, lb) using a punching or drilling mandrel (3) with one opposite to that which creates the through hole Working end (4) of the ^punching or drilling mandrel (3) has a tapered shaft (5); c) introducing a hollow rivet (2) with a central through opening (10) into the through ^hole , such that the hollow rivet (2) passes through the through hole, the central through opening (10) of the hollow rivet (2) being separated from the shaft ( 5) the punching ^or drilling mandrel (3) is penetrated; and

d) expanding the through-hole (10) ^passing through the through-hole and through the shaft (5) of the punching or drilling mandrel (3).

Hollow rivet (2) by passing the working end (4) of the punching or drilling mandrel (3) through the central through opening (10) of the hollow rivet (2) in a direction opposite to the punching or drilling direction (S).

3. The method according to claim 2, wherein the working end (4) of the punching or drilling mandrel (3) has thread ^- forming contours (20) and for expanding the hollow ^rivet (2) to form a thread in the direction opposite to the punching or drilling direction (S) is screwed into the ^through opening (10).

4. The method according to claim 3, wherein the

Punching or drilling mandrel is designed as a drilling mandrel (3) and the direction of rotation during drilling is opposite to the direction of rotation for screwing the thread-forming contours (20) of the working end (4) of the punching or drilling mandrel (3) into the through opening (10) for expansion the hollow rivet

(2) .

5. The method according to claim 2, wherein the

The hollow rivet (2) passing through the through hole is expanded by pulling the working end ((4) of the punching ^or drilling mandrel (3) counter to the punching or drilling direction (S) through the central through opening (10) of the ^hollow rivet (2).

6. The method according to claim 1, comprising

Steps : a) arranging the material sections (la, lb) to be connected so that they are adjacent to one another in the desired connection position;

b) introducing a through hole essentially perpendicular to the surface extent of the plate-shaped material sections (la, lb) in the flatly adjacent plate-shaped material sections (la, lb) using a punching or drilling mandrel (3) with a working end opposite the working end producing the through hole ( 4) of the punching or drilling mandrel (3) expanded shaft section (18) of the punching or drilling mandrel (3);

c) introducing a hollow rivet (2) with a central through opening (10) into the through hole, such that the hollow rivet (2) passes through the through hole, the central through opening

(10) the hollow rivet (2) is penetrated by the punching or drilling mandrel (3);

d) expanding the hollow rivet (2) passing through the through hole by inserting the expanded shaft section (18) of the punching or drilling mandrel (3) into the central through opening (10) of the hollow rivet (2); and

e) Removing the punching or drilling mandrel (3) from the central through opening (10) of the hollow rivet (2).

7. The method according to claim 6, wherein the expanded shaft section (18) of the punching or drilling mandrel (3) has thread-forming contours (20) and is screwed into the through opening (10) to expand the hollow rivet (2) to form a thread.

8. The method according to claim 7, wherein the punching or drilling mandrel is designed as a drilling mandrel (3) and the direction of rotation during drilling is identical to the direction of rotation for screwing in the extended shaft section (18) of the punching or drilling mandrel (3) to expand the hollow rivet (2) .

9. Method according to one of claims 7 to

8, in order to remove the punching or drilling mandrel (3) from the central through opening (10) of the hollow rivet (2), the punching or drilling mandrel (3) rotates in a direction opposite to the screwing direction from the extended shaft section (18 ) shaped thread is unscrewed.

10. Method according to one of claims 6 to

9, wherein a punching or drilling mandrel (3) is used, which is inserted into the central through-opening (10) of the hollow rivet (2) following the extended shaft section (18), which is inserted into the central passage opening (10) of the hollow rivet (2), one opposite this extended shaft section

(18) Advanced drilling and/or reaming cutting arrangement

(19), the expanded shaft section (18) being passed through the central through-opening (10) of the hollow rivet (2) in order to expand the hollow rivet (2) in the punching or drilling direction and then the through-opening (10) of the expanded through opening (10). ^¬ th hollow rivet (2) is drilled and/or reamed by inserting the drilling and/or friction cutting arrangement (19) while rotating the punching ^or drilling mandrel (3) in the intended working ^{direction of} rotation of the drilling and/or friction cutting arrangement (19). .

11. The method according to claim 8 and according to claim 10, wherein the direction of rotation during drilling is identical to the working direction of rotation of the drilling and / or

Friction cutting assembly (19).

12. The method according to any one of claims 10 to 11, wherein the punching or drilling mandrel (3) is not rotated when it is removed from the central through opening (10) of the hollow rivet (2).

13. The method according to any one of the preceding claims, wherein the through hole is brought to a final dimension by the punching or drilling mandrel (3) before expanding the hollow rivet (2).

14. Method according to one of claims 1 to

12, whereby the through hole created by the punching or drilling mandrel (3) is brought to a final dimension by inserting the hollow rivet (2) before expanding the hollow rivet (2).

15. The method of claim 14, wherein a

Hollow rivets (2) with drilling and/or friction cutting edges (6, 7), which have an effective diameter larger than the through hole created with the punching or drilling mandrel (3), while rotating the hollow rivet (2) in the intended cutting direction Drilling and/or reaming cutting (6, 7) is introduced into the through hole, whereby the through hole is brought to the final dimension before the hollow rivet (2) is expanded.

16. The method according to claim 15, wherein the hollow rivet (2) is ^rotatably driven via the punching or drilling mandrel (3).

17. The method according to claim 15, wherein the hollow rivet (2) is driven in rotation via ^drive means acting on the outside of the hollow rivet (2), with the punching or drilling mandrel (3) stationary or rotating.

18. Arrangement for use in the method according to one of claims 3 to 4 and according to claim 13, comprising

a) a punching or drilling mandrel (3) for producing a particularly circular through hole through several flatly adjacent plate-shaped material sections, in particular sheets (la, ■lb), by punching or drilling, the punching or drilling mandrel (3 ) a shaft that is tapered compared to its working end (4) which creates the through hole

(5); and

b) a hollow rivet (2) with a through opening (10) and with a particularly cylindrical outer contour, which can be inserted into a through hole created with the punching or drilling mandrel (3) and whose through opening is from the shaft (5) of the punching or drill mandrel (3) is or can be penetrated;

wherein the working end (4) of the punching or drilling mandrel (3) has thread-forming contours (20) and the punching or drilling mandrel (3) and the hollow rivets (2) are adapted to one another in such a way that the shaft (5) of the punching or drilling mandrel (3 ) in their through opening (10) through ^¬ inserted hollow rivets (2) by screwing the working end (4) of the punching or drilling mandrel (3) in the direction opposite to the punching or drilling direction (S) into the through opening (10) of the hollow rivet (2) can be expanded by forming a ^thread in the through opening (10) in such a way that after expansion it can no longer be inserted into a through hole created with the punching or drilling mandrel (3).

19. Arrangement according to claim 18, wherein the punching or drilling mandrel is designed as a drilling mandrel (3) and the direction of rotation for drilling is opposite to the direction of rotation for screwing in the thread-forming contours

(20) of the working end (4) of the punching or drilling mandrel (3) into the through opening (10) to expand the hollow rivet

Creating a particularly circular through hole through several flatly adjacent plate-shaped material sections, in particular sheets (la, lb), by punching or drilling, the punching or drilling mandrel (3) having a working end (4) which is tapered relative to its working end (4) which creates the through ^hole Has shaft (5); and

a hollow rivet (2) with a passage

Opening (10) and with a particularly cylindrical outer contour, which can be inserted into a through hole created with the punching or drilling ^mandrel (3) and whose through opening is from the shaft (5) of the punching or drilling mandrel (3) is penetrated or can be penetrated ^by anyone;

wherein the punching or drilling mandrel (3) and the hollow rivet (2) are adapted to one another in such a way that the hollow rivet (2) penetrated by the shaft (5) of the punching or drilling mandrel (3) in its through opening (10) is through a Pulling the working end of the punching or drilling mandrel (3) through the through opening (10) of the hollow rivet (2) ^against the intended punching or drilling direction (S) of the punching or drilling mandrel (3) can be expanded in such a way that it After expansion, it can no longer be inserted into a through hole created with the punching or drilling mandrel (3).

21. Arrangement (8) for use in the method according to one of claims 3 to 4 and according to one of claims 14 to 17, comprising

a) a punching or drilling mandrel (3) for producing a particularly circular through hole through several flatly adjacent plate-shaped material sections, in particular sheets (la, lb), by punching or drilling, the punching or

Drilling mandrel (3) has a shaft (5) which is tapered relative to its working end (4) intended for producing the through hole; and

b) a hollow rivet (2) with a through opening (10), which is or can be penetrated by the shaft (5) of the punching ^or drilling mandrel (3) and which has drilling and/or reaming cutting edges (6, 7) which have an effective diameter larger than the through hole that can be created with the punching or drilling mandrel (3), to enlarge one with the

Punching or drilling mandrel (3) created through hole by inserting the hollow rivet (2) while rotating it in the intended cutting direction of the drilling and / or reaming cutting edges (6, 7) into the through hole, wherein the working end (4) of the punching or drilling mandrel (3) has thread-forming contours (20) and the punching or drilling mandrel (3) and the hollow rivets (2) are adapted to one another in such a way that the shaft (5) of the punching or drilling mandrel (3 ) hollow rivets (2) inserted in their through opening (10) by screwing the working end (4) of the punching or drilling mandrel (3) in the direction opposite to the punching or drilling direction (S) into the through opening (10) of the hollow rivet ( 2) can be expanded to form a thread in the through opening (10).

22. Arrangement according to claim 21, wherein the

Punching or drilling mandrel is designed as a drilling mandrel (3) and the direction of rotation for drilling is opposite to the direction of rotation for screwing the thread-forming contours (20) of the working end (4) of the punching or drilling mandrel (3) into the through opening (10) for expansion the hollow rivet (2).

23. Arrangement (8) for use in the method according to claim 5 and according to one of claims 14 to 17, comprising

a) a punching or drilling mandrel (3) for producing a particularly circular through hole through several flatly adjacent plate-shaped material sections, in particular sheets (la, lb), by punching or drilling, the punching or drilling mandrel (3) being opposite his to produce the

Working end (4) has a tapered shaft (5) specific to the through hole; and

b) a hollow rivet (2) with a through opening (10), which is or can be penetrated by the shaft (5) of the punching or drilling mandrel (3) and which has drilling and/or reaming cutting edges (6, 7), which have an effective diameter larger than the through hole that can be created with the punching or drilling mandrel (3), to enlarge a through hole created with the punching or drilling mandrel (3) by inserting the hollow rivet (2) with rotation the same in the intended cutting direction of the drilling and/or reaming cutting edges (6, 7) into the through hole,

wherein the punching or drilling mandrel (3) and the hollow rivet (2) are adapted to one another in such a way that the hollow rivet (2) penetrated by the shaft (5) of the punching or drilling mandrel (3) in its through opening (10) is pulled through Working end (4) of the punching or drilling mandrel (3) can be expanded through the through opening (10) of the hollow rivet (2) against the intended punching or drilling direction (S) of the punching or drilling mandrel (3).

24. Arrangement (8) according to claim 23, wherein the shaft (5) of the punching or drilling mandrel (3) has driving contours, in particular in the longitudinal direction of the shaft (3), in particular in an area near the working end (4) of the punching or drilling mandrel (3). 5) has running ribs (9), into which a corresponding counter contour of the hollow rivet (2) can engage in a form-fitting manner in the intended direction of rotation of the drilling and / or friction cutting edges (6, 7) or onto which the hollow rivet (2) is produced a force and/or positive connection between the shaft (5) and the hollow rivet (2) can be pressed on in the intended direction of rotation of the drilling and/or friction cutting edges (6, 7), in order to transmit the torque for the rotation of the hollow rivet (2) from the shaft (5) of the punching or drilling mandrel (3) onto the hollow rivet (2).

25. Arrangement (8) according to claim 24, wherein the driver contours are designed as ribs (9) running spirally in the longitudinal direction of the shaft, the spiral direction of rotation being such that the hollow rivet (2) slides along the spiral ribs (9). the transmission of a torque from the ribs (9) to the hollow rivet (2) in the intended direction of rotation of the drilling and/or reaming cutting edges (6, 7) moves axially in the direction of the working end (4) of the punching or drilling mandrel (3).

26. Arrangement (8) for use in the method according to claim 6 and according to one of claims 14 to 17, comprising

a) a punching or drilling mandrel (3) for producing a particularly circular through hole through several flatly adjacent plate-shaped material sections, in particular sheets (la, lb), by punching or drilling, the punching or drilling mandrel (3) being opposite has an expanded shaft section (18) at its working end (4) intended for producing the through hole; and

b) a hollow rivet (2) with a through opening (10), which is or can be penetrated by the punching or drilling mandrel (3) and which has drilling and/or reaming cutting edges (6, 7) which have an effective diameter larger than have the through hole that can be created with the punching or drilling mandrel (3), to enlarge a through hole created with the punching or drilling mandrel (3) by inserting the hollow rivet (2) while rotating it in the intended cutting direction of the drilling and/or

Friction cutting (6, 7) into the through hole,

wherein the punching or drilling mandrel (3) and the hollow rivet (2) are adapted to one another in such a way that the hollow rivet

(2) can be expanded by inserting the extended shaft section (18) of the punching or drilling mandrel (3) into the through opening (10) of the hollow rivet (2).

27. Arrangement according to claim 26, wherein the extended shaft section (18) of the punching or drilling mandrel

(3) has thread-forming contours (20) and can be screwed into the through opening (10) to expand the hollow rivet (2) to form a thread.

28. Arrangement according to claim 27, wherein the punching or drilling mandrel is designed as a drilling mandrel (3) and the direction of rotation for drilling is identical to the direction of rotation for screwing in the expanded shaft section (18) of the punching or drilling mandrel (3) to expand the hollow rivet (2).

29. Punching or drilling mandrel (3) for an arrangement (8) according to one of claims 18 and 21, which has a shaft (5) which is tapered relative to its working end (4) which creates the through hole and wherein the working end (4) of the Punching or drilling mandrel (3) has thread-forming contours (20), in particular with a multi-start external forming thread.

30. Punching or drilling mandrel (3) according to claim 29, wherein the punching or drilling mandrel is designed as a drilling mandrel (3) and the direction of rotation for drilling is opposite to the direction of rotation for screwing in the thread-forming contours (20) of the working end (4) of the Punch or drill mandrel (3) into the through opening (10) to expand the hollow rivet (2).

31. Punching or drilling mandrel (3) for an arrangement (8) according to claim 27, which, in particular in an area near its working end (4), has a shaft section (18) which is widened relative to the working end (4) of the punching or drilling mandrel (3). with thread-forming contours (20), in particular with a multi-start forming external thread.

32. Punching or drilling mandrel (3) according to claim 31, wherein the punching or drilling mandrel is designed as a drilling mandrel (3) and the direction of rotation of the drilling mandrel (3) for drilling is identical to the direction of rotation for screwing in the thread-forming contours (20 ) of the extended

Shaft section (18).

33. Punching or drilling mandrel (3) for an arrangement (8) according to one of claims 20 and 23, comprising a shaft (5) which is tapered relative to its working end (4) which creates the through hole and is arranged on its outer circumference, in particular in one Area near its working end (4), driver contours, in particular ribs (9) running in the longitudinal direction of the shaft (5), for rotationally driving a hollow rivet (2) to be arranged thereon.

34. Punching or drilling mandrel (3) according to claim 33, wherein the punching or drilling mandrel is designed as a drilling mandrel (3) and in particular in an area near its working end (4) ribs (9) running spirally in the longitudinal direction of the shaft (5). has, the spiral direction of rotation being such that a hollow rivet (2) arranged on the shaft (5) and in engagement with the ribs (9) slides along the spiral-shaped ribs (9) as a result of the transmission of a ^torque from the ribs (9) to the hollow rivet (2) in ^the determined direction of rotation of the drilling mandrel (3) axially in the direction of the working end (5) of the drilling mandrel (3).

35. Hollow rivet (2) for an arrangement (8) according to one of claims 21 to 28, comprising a rivet body with a central through opening (10), which has a substantially cylindrical rivet shaft (11), one at a first end of the rivet shaft (11 ) arranged and radially projecting over the rivet shaft (11) ^¬ existing rivet head (12) and several drilling and / or reaming ^¬ cutters (6, 7) arranged at the second end of the rivet shaft (11).

36. Hollow rivet (2) according to claim 35, wherein the rivet shank (11) has a plurality of radial bores (13) in the area of its end adjacent to the drilling and / or reaming cutting edges (6, 7), in particular evenly distributed over its circumference, which extend from the outside into the central through opening (10).

37. Hollow rivet (2) according to one of claims 35 to 36, wherein the rivet shank (11) has segment cuts (14), particularly evenly distributed around its circumference, which increasingly penetrate radially into the rivet shank (11), in particular towards the rivet head (12). .

38. Hollow rivet (2) according to one of claims 35 to 37, wherein the rivet shaft (11) has a on its circumference has multiple helical groove and/or rib structure (15), the individual helical grooves and/or ribs of which surround the rivet shaft (11) several times.

39. Hollow rivet (2) according to claim 38, wherein the multi-helical groove and / or rib structure (15) consists of several, in particular evenly on the circumference of the

Nuts (16) distributed throughout the rivet shaft (11), which extend essentially in the axial direction or extend over the entire axial length of the groove and/or rib structure (15) only over a partial section of the circumference of the rivet shaft (11). extend and penetrate in the radial direction into the rivet shaft (11), in particular penetrate deeper into the rivet shaft (11) than the groove and / or rib structure (15).

40. Hollow rivet (2) according to one of claims 35 to 39, wherein the drilling and / or reaming cutting edges (6, 7) are formed by a front-side spiral-toothed cutting arrangement (6, 7) or include such a cutting arrangement (6, 7).

41. Hollow rivet (2) according to one of claims 35 to 40, wherein the drilling and / or reaming cutting edges (6, 7) are formed by a two-stage cutting arrangement (6, 7) or include such a two-stage cutting arrangement (6, 7).

42. Device for carrying out the method according to one of claims 1 to 5 using an arrangement according to one of claims 20 and 23 to 25 with a punching or drilling mandrel designed as a drilling mandrel (3).

a) a receptacle for the shaft (5) of the drill mandrel (3),

b) drive means, by means of which the drilling mandrel (3) can be rotated in the intended direction of rotation of the drilling mandrel (3) relative to fixed parts of the device when the shaft (5) is properly received in the receptacle, while exerting pressure on the drilling mandrel (3) with- by means of the device in the intended drilling feed direction (S) of the drilling mandrel (3),

c) Sling means with a stop surface on which, in a first relative position of the sling means relative to the drilling mandrel (3), a hollow rivet arranged on the shaft (5) of the drilling mandrel (3).

(2) when the shaft (5) of the drilling mandrel (3) is correctly received in the receptacle, it can strike in the direction opposite to the intended drilling feed direction (S); and

d) Drive means, by means of which, when the shaft (5) of the drilling mandrel (3) is properly received in the receptacle, starting from the first relative position of the stop means relative to the drilling mandrel

(3), a relative movement between the stop ^means and the drill mandrel (3) can be generated, in which the drill mandrel (3) moves in the direction opposite to its intended drilling feed direction (S) relative to the stop surface of the stop means.